215054145 has 12 divisors (see below), whose sum is σ = 372760596. Its totient is φ = 114695520.

The previous prime is 215054087. The next prime is 215054153. The reversal of 215054145 is 541450512.

215054145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 112720689 + 102333456 = 10617^2 + 10116^2 .

It is not a de Polignac number, because 215054145 - 2⁸ = 215053889 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2389446 + ... + 2389535.

It is an arithmetic number, because the mean of its divisors is an integer number (31063383).

Almost surely, 2^215054145 is an apocalyptic number.

It is an amenable number.

215054145 is a deficient number, since it is larger than the sum of its proper divisors (157706451).

215054145 is a wasteful number, since it uses less digits than its factorization.

215054145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4778992 (or 4778989 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 215054145 is about 14664.7245115617. The cubic root of 215054145 is about 599.1229268626.

The spelling of 215054145 in words is "two hundred fifteen million, fifty-four thousand, one hundred forty-five".